richie

n. [ Gr. &unr_;, &unr_;, hair. ] [ 1913 Webster ]

1. (Min.) A kind of crystallite resembling a bunch of hairs, common in obsidian. See Illust. of Crystallite. [ 1913 Webster ]

2. (Zool.) A delicate, hairlike siliceous spicule, found in certain sponges. [ 1913 Webster ]

Trichite sheaf (Zool.), one of the small sheaflike fascicles of slender setae characteristic of certain sponges. See Illust. under Spicule. [ 1913 Webster ]